OBD2 Gauge (ESP32 Bluetooth)

This repository has been archived and is no longer maintained. (October 24th, 2025)

A fully functional code-updated Last Update: September 27th, 2024

This is an ESP32 OBD2 Gauge for vehicles that are compatible with OBD2 (Special made for FORD vehicle)

• Prototype https://youtu.be/PkQaUJbzTNM
• Current Model Short Demo https://youtu.be/vvBIeim7XTE

Software:

• Arduino IDE 2.3.2 + ESP32 arduino core 2.0.17
• • IMPORTANT * this project won't work with ESP32 arduiino core 3.x.x
• modified TFT_eSPI library 2.5.43

Hardware

• ESP32 TFT2.8 320x240 with "RESISTIVE" touch board. buy here https://s.click.aliexpress.com/e/_Ew95gMl
• ELM327 Bluetooth adaptor (recommended v1.5 not v2.1) Highly recommend ELM327 Bluetooth adaptor https://s.click.aliexpress.com/e/_oo3THvG
• A small speaker for mobile phone 1 Watt 8 ohm 9x28 mmm.
• A push button 6x6x5 2 legs
• 3d print enclosure
• 12v to 5v dc micro usb power regulator module
• Gauge magnetic stand

Features:

• Show vehicle data 7 pids

• MAP - manifold air pressure (PSI)
• PCM - pcm voltage (volt)
• ENG LOAD - engine load (%)
• ENG SPD - engine speed (RPM)
• Coolant - coolant temperature (c)
• Oil Temp - engine oil temperature (c)
• TFT - Ford transmission fluid temperature (c)

• 8 layout page selectable display
• DTC read and clear function (Engine warning light only)
• Warning when parameter reaches setting value
• Adjustable warning value for each PIDs
• Configurable CPU overheat protection
• Configurable gauge Auto turn on/off
• Auto screen brightness
• Change off screen to user screen with micro SDcard
• Firmware updatable (micro SDcard and WiFi)
• VIN Read on the About page.

Flash Firmware Online

---

Emulador OBD2 / ELM327 Bluetooth incluido

En la carpeta se incluye el script para emular un adaptador ELM327 v1.5 y la ECU del vehículo vía Bluetooth SPP en Linux. Permite probar y validar la pantalla CYD en banco de pruebas sin necesidad de conectarse a un auto real. Consulta emulator/README.md para ver requisitos y modo de uso.